High-purity tin composition, methods for storing and producing the same, and tin hydrolysate, tin hydrolysate solution, and tin hydrolysate thin film using the same

Abstract

A high-purity tin composition that can maintain high purity for a long time, in which decomposition of a triaminotin compound is suppressed and high purity of the triaminotin compound is maintained, is provided. The tin composition contains 95 mol % or more of a triaminotin compound having formula (1) in terms of tin atoms, and 0.001 to 0.5 mol % of a tetraaminotin compound having formula (2) in terms of tin atoms: R is a hydrocarbon group having 1 to 30 carbon atoms which is optionally substituted with a halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other; two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen.

1 . A tin composition comprising 95 mol % or more of a triaminotin compound having formula (1) in terms of tin atoms, and 0.001 to 0.5 mol % of a tetraaminotin compound having formula (2) in terms of tin atoms: 
       
         
           
           
               
               
           
         
         wherein in formula (1) and (2), R is a hydrocarbon group having 1 to 30 carbon atoms which is optionally substituted with a halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, and 
         wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen. 
       
     
     
         2 . The tin composition according to  claim 1 , wherein the tin compound comprises 97 mol % or more of the triaminotin compound having formula (1) in terms of tin atoms. 
     
     
         3 . The tin composition according to  claim 1 , wherein the tin compound comprises 0.5 mol % or less of a diaminotin compound having formula (3) in terms of tin atoms: 
       
         
           
           
               
               
           
         
         wherein in general formula (3), R is a hydrocarbon group having 1 to 30 carbon atoms and optionally substituted with halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, and 
         wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen. 
       
     
     
         4 . The tin composition according to  claim 1 , wherein the tin compound comprises 0.01 to 0.5 mol % of the tetraaminotin compound having formula (2) in terms of tin atoms. 
     
     
         5 . A tin composition comprising 95 mol % or more of a triaminotin compound having formula (1) in terms of tin atoms, wherein the triaminotin compound having formula (1) has a decomposition rate of 0.85 mol % or less after being held at 140° C. for 5 hours under a nitrogen atmosphere: 
       
         
           
           
               
               
           
         
         wherein in formula (1), R is a hydrocarbon group having 1 to 30 carbon atoms which is optionally substituted with a halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, and 
         wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen. 
       
     
     
         6 . The tin composition according to  claim 5 , wherein the tin compound comprises 97 to 99.9 mol % of the triaminotin compound having formula (1) in terms of tin atoms. 
     
     
         7 . The tin composition according to  claim 1 , wherein the tin compound further comprises 0.001 to 1.0 mol % of a compound having formula (7) in terms of tin atoms: 
       
         
           
           
               
               
           
         
         wherein in general formula (7), R is a hydrocarbon group having 1 to 30 carbon atoms and optionally substituted with halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, and 
         wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen. 
       
     
     
         8 . The tin composition according to  claim 7 , wherein the tin compound comprises 0.001 mol % or more of each of the compounds having formula (2) and formula (7), and a total content of the compounds having formula (2) and formula (7) is 0.001 to 1.0 mol % in terms of tin atoms. 
     
     
         9 . The tin composition according to  claim 1 , wherein the tin compound further comprises 0.001 to 1.0 mol % of a compound having formula (9) in terms of tin atoms: 
       
         
           
           
               
               
           
         
         wherein in general formula (9), R is a hydrocarbon group having 1 to 30 carbon atoms and optionally substituted with halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, and 
         wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen. 
       
     
     
         10 . A tin composition comprising 95 mol % or more of a triaminotin compound having formula (1) in terms of tin atoms, 0.001 to 0.5 mol % of a tetraaminotin compound having formula (2) in terms of tin atoms, 0.5 mol % or less of a diaminotin compound having formula (3) in terms of tin atoms, 0.001 to 1.0 mol % of a compound having formula (7) in terms of tin atoms, and 0.001 to 1.0 mol % of a compound having formula (9) in terms of tin atoms: 
       
         
           
           
               
               
           
         
       
       wherein
 in formula (1) and (2), R is a hydrocarbon group having 1 to 30 carbon atoms which is optionally substituted with a halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen; 
 in general formula (3), R is a hydrocarbon group having 1 to 30 carbon atoms and optionally substituted with halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen; 
 in general formula (7), R is a hydrocarbon group having 1 to 30 carbon atoms and optionally substituted with halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen; and 
 in general formula (9), R is a hydrocarbon group having 1 to 30 carbon atoms and optionally substituted with halogen, an oxygen atom, or a nitrogen atom, and R's are each a hydrocarbon group having 1 to 10 carbon atoms and may be identical or different from each other, wherein two R's on the same nitrogen atom may be bonded to each other to form a 3- to 7-membered ring containing nitrogen. 
 
     
     
         11 . The tin composition according to  claim 1 , wherein the tin compound further comprises a solvent. 
     
     
         12 . A method for storing a tin composition, wherein the tin composition according to  claim 1  is stored in a sealed container under a nitrogen atmosphere. 
     
     
         13 . The method for storing a tin composition according to  claim 12 , wherein the tin compound is stored for a period of 3 days to 1 year. 
     
     
         14 . The method for storing a tin composition according to  claim 12 , wherein the tin composition is stored at a temperature of −10° C. or higher and 40° C. or lower. 
     
     
         15 . A method for producing a tin composition according to  claim 1 , the method involves providing a crude tin composition, distilling the crude tin composition, and collecting a fraction which comprises the tin composition of  claim 1   
     
     
         16 . A method for producing a tin composition according to  claim 1 , the method comprising a step of adding the tetraaminotin compound having formula (2) to a tin composition that contains the triaminotin compound having formula (1) but does not contain the tetraaminotin compound having formula (2). 
     
     
         17 . The method for producing a tin composition according to  claim 15 , wherein a first fraction is included in a fraction in distillation of a crude tin composition. 
     
     
         18 . A tin hydrolysate of the tin composition according to  claim 1 , wherein the tin hydrolysate has formula (10): 
       
         
           
           
               
               
           
         
         wherein x satisfies 0<x≤3. 
       
     
     
         19 . A tin hydrolysate solution comprising the tin hydrolysate according to  claim 18  and an organic solvent. 
     
     
         20 . A tin hydrolysate thin film comprising the tin hydrolysate according to  claim 18 .